RD Telinet Private Limited

BT version : 5.4 / play Time : up to 48hrs 
talking time : upto 48hrs / charging Time : 1.5-2 hrs 
standby Time : 240hrs / Battery: 200Mah 
trasmission Distance : 10-15M / Speaker  size : 10.2mm. charging port : Type -c /independence : 32
sensitivity: 1200B at 1khz / water Resistance: IPX5
Frequency. 20hz -20khz / mic independence : 2200 supported protocol: hsp , hfp, A2DP , AV , RCP 
Mobile, Laptop, Audio Player (devices with Bluetooth)The RD M-146 is a practical and standard neckband model focused on extended use with its 48-hour playtime. It uses a modern Type-C port for charging, which offers faster and more convenient charging than older Micro-USB ports. As with other RD neckbands, it is designed for a secure, comfortable fit suitable for daily activities. It provides a wireless audio experience, allowing users to listen to music or take calls without the hassle of tangled wires. 

Specification .BT VERSION : 5.4 PLAY Time up to 54hrs talking time up to 54hrs charging Time :1.5- 2hours  standby Time : over 270hours charging port : type c , transmission Distance (32ft)15m . Battery : 200 mah . sensitivity 120db at 1khz Impedence 32ohm . frequency range : 20hz - 20khz . support profilies : hsp , hFP , A2DP , AVRCP WATER  RESISTANCE IPX5